Immuron Ltd

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

FORM 20-F

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended June 30,2026

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

OR

☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report

Commission file number 001-38104

IMMURON LIMITED

(Exact name of Registrant as specified in its

charter and translation of Registrant’s name into English)

Australia

(Jurisdiction of incorporation or organization)

Level 3, 62 Lygon Street, Carlton South, Victoria,3053, Australia

(Address of principal executive offices)

Mr. Steven Lydeamore, Chief Executive Officer

Level 3, 62 Lygon Street, Carlton South, Victoria,3053, Australia

Telephone:+61 (0)3 8892 4854

(Name, telephone, e-mail and/or facsimile number and address of company contact person)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

Securities registered or to be registered pursuant to Section 12(g) of the Act: None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None

The number of outstanding ordinary shares of the issuer, as of June 30, 2026, was 322,848,081 ordinary shares.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes ☐No ☒

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 (d) of the Securities Exchange Act of 1934.

Yes ☐No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§2232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Exchange Act. ☐

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow:

Item 17 ☐ Item 18 ☐

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐ No☒

INTRODUCTION

We are a commercial and clinical-stage biopharmaceutical company with a proprietary technology platform focused on the development and commercialization of a novel class of specifically targeted polyclonal antibodies that we believe can address significant unmet medical needs. This is a large addressable market which continues to grow as we seek to increase sales of our existing commercial products and to expand our product portfolio and distribution capability.

We currently market our flagship commercial product Travelan® and ProIBS® in Australia, where both products are listed medicine on the Australian Register for Therapeutic Goods. Travelan® (AUST L 106709) is an over-the-counter product indicated to reduce the risk of travelers’ diarrhea, reduce the risk of minor gastro-intestinal disorders and is antimicrobial and is sold in pharmacies throughout Australia. ProIBS® (AUST L 482225) is an over-the-counter orally administered product containing the proprietary ingredient AVH200® which has a unique dual mode of action, forming a gentle hydrogel film inside the gut, creating a protective, non-invasive barrier that supports the intestinal lining, balances microflora, and helps soothe irritable bowel syndrome (IBS) symptoms. ProIBS® is indicated for the relief of symptoms of medically diagnosed Irritable Bowel Syndrome. We also market Travelan® (NPN 80046016) in Canada where it is licensed as a natural health product indicated to reduce the risk of travelers’ diarrhea, and presently market Travelan® in the U.S. as a dietary supplement for digestive tract protection. Protectyn® (AUST L 231001) was sold online and in health practitioner clinics and marketed as an immune supplement to help maintain a healthy digestive function and liver. The company cancelled and removed the product from the Australian Register for Therapeutic Goods in June 2026.

Our polyclonal antibodies offer delivery within the gastrointestinal (“GI”) tract and do not cross into the bloodstream, potentially leading to improved safety and tolerability, without sacrificing efficacy. Our technology platform can be used to target viruses or bacteria and neutralize the toxins they produce at mucosal surfaces. We believe that our lead drug candidates currently entering the clinical development phase have the potential to transform the existing treatment paradigms for EnterotoxigenicEscherichia coli(ETEC) infections, travelers’ diarrhea and for*Clostridioides difficile (C.difficle)*infections.

Our American Depositary Shares (each, an “ADS” and, collectively the “ADSs”) are listed on The NASDAQ Capital Market under the symbol “IMRN”. Each ADS represents 40 of our ordinary shares, no par value. Our ordinary shares are also listed on the Australian Securities Exchange (“ASX”) under the symbol “IMC.”

Our consolidated financial statements appearing in this annual report are prepared in Australian dollars and in accordance with the International Financial Reporting Standards, or IFRS, as issued by the International Accounting Standards Board, or IASB. Our consolidated financial statements appearing in this annual report comply with the IFRS.

In this annual report, all references to “U.S. dollars” or “US$” are to the currency of the United States, and all references to “Australian dollars”, “A$” or “$” are to the currency of Australia. Unless otherwise indicated or the context implies otherwise, items included in the financial statements of each of the group’s entities are measured using the currency of the primary economic environment in which the entity operates (‘the functional currency’). The consolidated financial statements are presented in Australian dollar (“A$” or “$”), which is Immuron Limited’s functional and presentation currency. Unless otherwise indicated or the context implies otherwise, all references to the “Company,” “Immuron,” “we,” “us,” or “our” refers to Immuron Limited, an Australian corporation and its subsidiaries. The “group” refers to Immuron and its subsidiaries collectively.

Statements made in this annual report concerning the contents of any contract, agreement or other document are summaries of such contracts, agreements or documents and are not complete descriptions of all of their terms. If we filed any of these documents as an exhibit to this annual report or to any registration statement or annual report that we previously filed, you may read the document itself for a complete description of its terms.

Except for the historical information contained in this annual report, the statements contained in this annual report are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and the Private Securities Litigation Reform Act of 1995, as amended, with respect to our business, financial condition and results of operations. Such forward-looking statements reflect our current view with respect to future events and financial results. We urge you to consider that statements which use the terms “anticipate,” “believe,” “expect,” “plan,” “intend,” “estimate,” or the negative of these terms or other comparable terminology are intended to identify forward-looking statements. We remind readers that forward-looking statements are merely predictions and therefore inherently subject to uncertainties and other factors and involve known and unknown risks that could cause the actual results, performance, levels of activity, or our achievements, or industry results, to be materially different from any future results, performance, levels of activity, or our achievements expressed or implied by such forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Except as required by applicable law, including the securities laws of the United States, we undertake no obligation to publicly release any update or revision to any forward-looking statements to reflect new information, future events or circumstances, or otherwise after the date hereof. We have attempted to identify significant uncertainties and other factors affecting forward-looking statements in the Risk Factors section that appears in Item 3.D. “Key Information-Risk Factors.”

Our ordinary shares are primarily quoted on the ASX in addition to our listing of our ADSs on the NASDAQ Capital Market. As part of our ASX listing, we are required to comply with various disclosure requirements as set out under the Australian Corporations Act 2001 and the ASX Listing Rules. Information furnished under the sub-heading “Australian Disclosure Requirements” is intended to comply with ASX listing and Corporations Act 2001 disclosure requirements and is not intended to fulfill information required by this annual report on Form 20-F.

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